Frank R Nakatsukasa

Title: Frank R Nakatsukasa: Innovator in Laser Gyroscopes and Magnetic Mirrors

Introduction

Frank R Nakatsukasa is a notable inventor based in Gardena, CA (US). He has made significant contributions to the field of laser gyroscopes and magnetic mirrors, holding a total of 2 patents. His innovative work has advanced the technology used in precision measurement and navigation systems.

Latest Patents

One of Nakatsukasa's latest patents is for a "Ring laser gyro and magnetic mirror therefor." This invention describes a laser gyroscope that is formed as a sealed, unitary assembly of mirrors that are optically contacted to a monolithic gyro block. The design eliminates the need for Brewster windows, which typically isolate the laser plasma from the mirrors. The mirrors are constructed with hard multilayer dielectric films that can withstand plasma exposure. Additionally, the invention includes a magnetic mirror that utilizes the transverse Kerr effect to separate the frequencies of counter-propagating beams, thereby avoiding lock-in. This magnetic mirror features a Ni-Fe alloy layer with a thin iron or iron alloy layer deposited on top, creating a rotationally switchable Kerr effect combination. The magnetic field for switching is generated by an electric current developed in two pairs of orthogonally disposed wires embedded in the substrate.

Another significant patent is for a "Method and apparatus for measuring non-reciprocal loss of thin magnetic." This invention provides a high-accuracy method for measuring the non-reciprocal reflectivity of magnetic thin film materials and magnetic mirrors. It employs an ellipsometer that uses a Helmholtz coil for magneto-optic modulation of p-polarized light, along with an acousto-optic modulator for intensity modulation. The system incorporates a novel scheme of analyzer rotation and computational techniques to accurately measure non-reciprocal reflectivity. A microcomputer is utilized for controlled rotation of polarizing elements, data logging, data analysis, and output.

Career Highlights

Frank R Nakatsukasa has had a distinguished career at Northrop Corporation, where he has been instrumental in developing advanced technologies. His work has not only contributed to the company's success but has also had a lasting impact on the field of optical engineering.

Collaborations

Throughout his career, Nakatsukasa has collaborated with notable colleagues, including V Warren Biricik and Wah L